mohammed is sleeping. his eyelids are quivering because his eyes are darting around. mohammed is probably experiencing ________ sleep.

Mohammed is probably experiencing rapid eye movement (REM) sleep. During REM sleep, the eyelids often quiver, and the eyes dart rapidly behind closed eyelids. This stage is characterized by rapid eye movements, increased brain activity similar to wakefulness, and vivid dreaming. The quivering eyelids and darting eyes are typical signs of this sleep phase. REM sleep also involves temporary muscle paralysis, preventing the sleeper from acting out dreams.